74947521071 has 4 divisors (see below), whose sum is σ = 74949448200. Its totient is φ = 74945593944.

The previous prime is 74947521043. The next prime is 74947521073. The reversal of 74947521071 is 17012574947.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74947521071 - 2²² = 74943326767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74947521073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904001 + ... + 983418.

It is an arithmetic number, because the mean of its divisors is an integer number (18737362050).

Almost surely, 2^74947521071 is an apocalyptic number.

74947521071 is a deficient number, since it is larger than the sum of its proper divisors (1927129).

74947521071 is a wasteful number, since it uses less digits than its factorization.

74947521071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927128.

The product of its (nonzero) digits is 493920, while the sum is 47.

The spelling of 74947521071 in words is "seventy-four billion, nine hundred forty-seven million, five hundred twenty-one thousand, seventy-one".